Subsequent to the publication of Ralph Nader’s watershed book “Unsafe at Any Speed” and growing public concern over vehicle-related fatalities and injuries, these federal acts established national safety standards for motor vehicles and roads. Cars were required for the first time to include seat belts, headrests, shatter-resistant windshields and impact-absorbing steering wheels, while roadways were mandated to feature more-secure guardrails, breakaway signs and improved illumination.